Knife



T. CHAMPLIN KNIFE Jy' 3i; 1923. 1,463,573

Filed June 17, 1922 WHT (hemp/in j Patented .iuly 3l, 1923.

1,463,573 ice.

Application lecl June 17,

3, 1914. The knife embodying this inven tion like the knife shown in myearlier patent i-s composed in the usual manner of iron or steel and itis not made, as has been previousl the custom, of certain non-.magneticmaterial. It differs therefrom in that there are blades at one end onlyinstead of at both ends.

The chief` object of this invention is to construct and arrange theparts of the knife having blades at one end only so that the magneticinfluence thereof will be entirelycounteracted, and the needle of thecompass will be free to respond to the magy netic influences of theearth.l

Other objects will appear from a consideration of the specification andof the drawings which form a part thereof and in which,

Figure 1 is a side elevation of one embodiment of this invention;

Fig. 2 is a side elevation of such lmife with one of the blades and theouter scale adjacent to it removed; and

Fig. 3 is a side elevation of the butt lof the knife taken from theopposite side with one of the outer scales removed.

Referring to the drawings the reference numeral 10 is used to designatethe handle or casing of a knife embodying this invention, which knife isprovided with a cuttin blade 11 and a combined can-opener anbottle-opener blade 12. These blades 11 and 12 are both pivoted at thesame end of the knife at either side of a middle scale 13. Suitableouter scales 14 and 15 are provided to hold the blades in place and thuscomplete the knife. The end of the scale 13 adjacent the blades 11 and12 is extended to form a screw-driver 16 and is `cut away at 17 as shownparticularly in Fig. 2 so as to reduce as m'uch as possible the amountof metal without impairing the function of the scale. A back spring 18is provided to 1922. Serial No. 569,160.

coact with the blade 12 and a similar spring (not shown) Iis provided tocoact with the blade 11. These springs of course function 1n the usualmanner to hold the blades either closed, half opened, or fully opened.

The blade 12 is magnetized slightly, the leg 19 constituting thepositive Apole and the leg 20 the negative pole. As shown in dottedlines in Fig. 2 the blade is constantly 1 n contact with the\back spring18. The spring 18 is also magnetized slightly and with the blade 12formsv a horseshoe magnet, which encloses the lcompass and counteractsthe influence of the blade 12 thereon. The part of the spring away fromthe blade 12 is curved as at 22 and terminates at 21 at the top of thehandle, the end 21 constituting one pole of the combined ma et.

he compass 23 is embedded in the cover 24 on the outer scale 15 and isset with the letter N of the dial nearest the blade end of the casing.This compass is magnetized and when the blade 12 is closed, lies 1n thelines 'of force between the legs 19 and 20 so that its magnetism isretained. A bail 26 is fixed to the butt of the knife and not only actsas a means to which a lchain could be applied but also acts vtocounteract the influence of the cutting blade 11.

When it is desired to determine direction, the knife is arranged asshown in Fig. 1 with the cutting blade 11 fully opened and thecan-opener and bottle-opener blade 12 half opened. The knife so set upis laid on its side with the compass uppermost and leveled so that thecompass needle is free to move. Since the back spring 18 and the blade12 are both magnetized and form a horseshoe magnet which encloses thecompass, they counterbalance each other and have no effect upon theaccuracy of the needle. The compass is mounted somewhat nearer the bladeend of the knife and by reason of the cutting away of the scale 13, theattraction of the end portions of the scale are equalized.

While one embodiment -only has been shown and described, applicant isnot to be limited thereby, since it is obvious that other embodimentscould be made without departing from the spirit and scope of theinvention asA set forth in the Ifollowing claims.

Having thus described my invention, that which I claim as new and forwhich I de# sprin 3. knife having a handle, a cuttlng blade and combinedcan-opener and bottleopener blade pivoted at one of said handles,

said opener'blade being magnetized and having two legs forming polesoppositely magnetized, a magnetized back spring contacting with saidopener blade, one end of said spring being continued to terminate at thetop of said handle, the blade and spring together constituting ahorseshoe magnet, and a compass embedded in said handle so as to beenclosed by said magnet.

4. A knife having a handle, blades pivoted at one end only thereof, oneof said?, blades being magnetized and having two;

legs constituting the opposite poles, and a magnetized compass embeddedin said handle and so positioned as to lie in the lines of force betweensaid legs when said bladel is closed. v

In testimony whereof l alix my signature.

'llllN'll CHAMPLN.

